Optarles henry ridsdale



UNi'r-ED STATES PATENT OFFICE.

CHARLES HENRY RIDSDALE, OF GUISBOROUGH, AND ALFRED JONES, OF

MIDDLESBOROUGH, EN GLAND.

LUBRICANT.

SPECIFICATION forming part of Letters Patent No. 486,196, dated November15,1892.

Application filed November 17, 1891. Serial No. 412,137. (No specimens.)

To all whom it may concern:

Be it known that we, CHARLES HENRY RIDSDALE, analytical chemist, of TheGrange, Hutton, Guisborough, and ALFRED J ONES, rolling-mill manager, ofOlevelandView, Newport Hill, Middlesborough, both. in the county ofYork, in the Kingdom of England, respectively, subjects of the Queen ofGreat Britain, have invented certain new and useful Improvements inLubricants, of which the following is a specification.

The object of this invention is a lubricant especially suitable forheavy machinery, such as the necks of rolls in iron and steel rollingmills, heavy engine-shafts, axles, &c. Hitherto it has been usual toapply the lubricant by some such method as smearing it on (which entailsgreat waste) or inclosing it in bags or some outer covering permeable bythe lubricant, (which necessitates the use of lubricants of lowmelting-points and viscosity,) in consequence of which great wasteensues, and also the bearings are less perfectly protected from wearthan by a more solid lubricant.

We make the lubricant in solid form, as blocks, bars, slabs, &c.,suitable to the requirements of the machinery, or as a more or lesssolid grease, according to consistency required, where preferable, andin order to obtain a lubricant which will resist the effects of hightemperature and water, singly or combined,

without undue wear we use a hard insoluble.

alkaline-earth soap, and combine therewith oils, ordinary soap as metwith in the market, and a solid mineral lubricating material, as mica,plumbago, or sulphur, or a mixture of these.

For the harder form of lubricant we prefer a mixture substantially asfollows: lime hydrate, three per cent; tallow, twenty-one per cent;total, twenty-four per cent; ordinary soap, six per cent; suet, tallow,or other saponifiable oil or grease, fifty-four per cent. fine plumbago,sixteen per cent.

For a softer kind of lubricant, the following is a suitable formula:lime hydrate, two per cent.; tallow, fourteen per cent.; limesoap,sixteen per cent; rendered suet or tallow, thirty-one per cent; sulphur,nine per cent; plumbago, fourteen per cent; heavy 5o petroleum-oil,thirty per cent.

For some kinds of work we prefer simply a mixture of hard insolublealkaline-earth soap and sulphur in various proportions.

We would have it understood that the above 5 5 proportions are not to betaken as binding, as considerable variation may be made therein.

On preparing the lubricants it is preferable to mix the oil or grease orequivalent fatty matter to be saponified with a greater or less quantityof the ordinary soap, as this induces the saponification to commence.The alkaline earth, 850., is then added either dry or made up into asirup with a small quantity of water, and heat is then applied and allthe I uncombined water driven off. In this way the lime-soap is formedin the mass and intimately mixed much more quickly than if formedseparately and added, the ordinary soap greatly aiding thesaponification. The remainder of the ingredients is then added and themass preferably cast into blocks or bars and allowed to cool.

In conclusion, we are well aware that a mixture of insoluble soap andplumbago has been proposed for this purpose; but such mixture. is of apulverulent or soft nature, and the-in soluble soap has been added tothe plumbago to assist in causing it to adhere to the surface and is inthe proportion of about thirtythree per cent. of the mass. In our casewe add, as a rule, only from two to five per cent. of insoluble soap,and this is mixed with ordinary potash or soda soap, as sold for washingpurposes, preferably soda-soap, to harden it. We are further aware thatlime in dry powder has been added to grease and other material tocorrect acidity; but in this case it is only a simple mixture, and analkalineearth carbonate, which under no circumo stances will make asoap, is generally mentioned as an equivalent, and, indeed, for thispurpose mechanical admixture to cure acidity will do just as well; but

We declare that what we claim is-= 5 1. A lubricant consisting of thecombination of hard alkalineearth soap, ordinary soap, fatty matterscontaining a large amount of stearine, and a solid lubricating material,In testimony whereof we have signed our the whole forming asomewhat-greasy body names to this specification in the presence of IOcapable of just being scraped by the nail and two subscribing Witnesses.

not fusing under the boiling-point of Water. CHARLES HENRY RIDSDALE. 52. A lubricant consisting of the c0mbina- ALFRED JONES.

tion of an alkaline earth and fatty matters Witnesses:

consisting largely of stearine, ordinary soap, DAVID DAVIES,

and sulphur, substantially as described. PERCY A. G. BROADBRIDGE.

